8020394591 has 4 divisors (see below), whose sum is σ = 8749521384. Its totient is φ = 7291267800.

The previous prime is 8020394581. The next prime is 8020394593. The reversal of 8020394591 is 1954930208.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8020394591 - 2¹⁴ = 8020378207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8020394593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 364563380 + ... + 364563401.

It is an arithmetic number, because the mean of its divisors is an integer number (2187380346).

Almost surely, 2^8020394591 is an apocalyptic number.

8020394591 is a deficient number, since it is larger than the sum of its proper divisors (729126793).

8020394591 is a wasteful number, since it uses less digits than its factorization.

8020394591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729126792.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 8020394591 is about 89556.6557604738. The cubic root of 8020394591 is about 2001.6981070582.

The spelling of 8020394591 in words is "eight billion, twenty million, three hundred ninety-four thousand, five hundred ninety-one".